n(minim) : 18 = ... (rest 15) => n(minim) = M₁₈+15
: 72 = ... (rest 15) = M₇₂+15
; 60 = ... (rest 15) = M₆₀+15
↓
n(minim) - 15 = [18;72;60] = 360
18 = 2 * 3² n(minim) = 360+15 = 375 .
72 = 2³ * 3²
60 = 2² * 3 * 5
------------------
[18;72;60]=2³ * 3² * 5 = 360